Report on Dieng Volcanic Complex (Indonesia) — June 2003
Bulletin of the Global Volcanism Network, vol. 28, no. 6 (June 2003)
Managing Editor: Edward Venzke.
Dieng Volcanic Complex (Indonesia) Plume emissions and modest seismicity through early July 2002
Please cite this report as:
Global Volcanism Program, 2003. Report on Dieng Volcanic Complex (Indonesia). In: Venzke, E (ed.), Bulletin of the Global Volcanism Network, 28:6. Smithsonian Institution. https://doi.org/10.5479/si.GVP.BGVN200306-263200.
Dieng Volcanic Complex
7.2°S, 109.879°E; summit elev. 2565 m
All times are local (unless otherwise noted)
Seismicity and plume frequency increased at Dieng beginning in April 2002 (BGVN 27:05). During 27 May-7 July 2002, the Volcanological Survey of Indonesia (VSI) reported higher-than-normal activity. Deep and shallow earthquakes were recorded, along with tectonic events (table 3). During 27 May-9 June, VSI reported a white plume from Sileri crater up to 50 m high. Observations in mid-June revealed a mud ejection from Sikidang crater. Dieng remained at Alert Level 2 (on a scale of 1-4). No further reports were issued through at least May 2003.
|Date||Deep volcanic||Shallow volcanic||Distant tectonic|
|27 May-02 Jun 2002||1||25||1|
|03 Jun-09 Jun 2002||1||38||1|
|10 Jun-16 Jun 2002||13||14||1|
|17 Jun-23 Jun 2002||--||18||3|
|24 Jun-30 Jun 2002||--||7||2|
|01 Jul-07 Jul 2002||--||3||--|
Geologic Background. The Dieng plateau in the highlands of central Java is renowned both for the variety of its volcanic scenery and as a sacred area housing Java's oldest Hindu temples, dating back to the 9th century CE. The Dieng volcanic complex consists of two or more stratovolcanoes and more than 20 small craters and cones of Pleistocene-to-Holocene age over a 6 x 14 km area. Prahu stratovolcano was truncated by a large Pleistocene caldera, which was subsequently filled by a series of dissected to youthful cones, lava domes, and craters, many containing lakes. Lava flows cover much of the plateau, but have not occurred in historical time, when activity has been restricted to minor phreatic eruptions. Toxic gas emissions are a hazard at several craters and have caused fatalities. The abundant thermal features and high heat flow make Dieng a major geothermal prospect.
Information Contacts: Dali Ahmad, Volcanological Survey of Indonesia (VSI), Jalan Diponegoro No. 57, Bandung 40122, Indonesia (URL: http://www.vsi.esdm.go.id/).